Due to a massive virus attack, I have forbidden my daughter from using AIM on my COMPUTER (she has her own, but is too lazy to set it up).  My ex-wife (who typed in GOGGLE vs. GOOGLE and caused the virus attack), SUGGESTED that I pick up a KVM switch, so my daughter can piggyback her computer to mine and use AIM (versus using the bleedin' telephone).
While this sounds good in theory, since it is my computer that is hooked to the phone line, and said daughter is simply accessing AIM through my system (WINDOWS ME), won't any possible virus attack my system and leave hers alone?
Please let me know.

Bertram Gibbs
Install a firewall, virus scan and adware scanner on all the computers connected to the Internet.

How Stuff Works - How Firewalls WORK

How Stuff Works - How Computer Viruses Work A KVM switch is purely to allow you to use the same keyboard, video & mouse on 2 computers - it has nothing to do with a shared internet connection, which is, I believe, what you mean.  Anyway, the upshot is that if you use your computer as a gateway for your daughter's computer, both are at risk.  Anyone using the internet must, as Raptor says, install a decent virus scanner, spyware scanner and software firewall on each machine as a MINIMUM protection.